You can THINK those responses, but should never EVER post them!
For starters, change your mindset - it's not abuse at all - let's not forget that not everybody has your IQ, interest, or specific knowledge of your niche. And, overall, being a nice person doesn't cost any money.
So, even if they post 'dumb questions' in the comments of whatever kind (which I get A LOT of), there are four reasons why you should ALWAYS respond in a nice manner:
(1) We all know it's a numbers game - so let's get some perspective here: I get about 1,000,000 views per month on my channel - say 3% of those bother to ENGAGE with a like, share, watch later bookmark etc - that's 30,000 people - and out of those, 3% will bother to post a comment - that's 900 comments per month, or 30 comments a day across all my vids on my entire channel. How SPECIAL should I treat those people who comment, given it's about 1-out-of-every-1,000 views? (hence, 999 of them never bothered)
(2) THEY took the time to engage with your content; they consumed part/all of the video(s), and clearly, something sparked their interest (ie what song, game, platform, etc) for them to now POST a comment, so, THE LEAST you, as the creator, can do is ACKNOWLEDGE their existence, show appreciation towards them taking time out of their day to leave a comment, and answer WHATEVER question they have (as stupid/dumb/repetitive you actually think it might be);
Examples:
'Thanks for stopping by. The background music in this video is called XYZ by XYZ'
'Appreciate you taking the time to comment. Afraid this isn't on mobile.'
'Awesome to see your comment here. The game title is XYZ.'
'Thx 4 for Q. This game is called XYZ made by XYZ. Which was your favorite part?'
(3) THEY will be notified of your response, likely visit your channel again to see what you answered, be impressed you took the time to actually respond, and who knows, they'll subscribe or watch your old/new content again, and that's how you build a community around your channel with hardc0re followers who will now start watching your every move;
(4) ANY engagement on your videos sends YouTube algorithm a signal that there's activity happening and that's never a bad thing.
For what it's worth - I reply with a similar answer mentioned in the above examples to EVERY COMMENT made on my channel. Do you know how many people are surprised I'm even reading their messages, nevermind responding to them?
It builds SOOO MUCH goodwill with your audience - not just for those few people who actually take the time to post the question, but especially for the many MANY lurkers who never leave a comment BUT read every single comment on every single video of yours, and form their own -silent- opinion of you!
Do me a favor - try doing this for a couple of weeks, see how people will be AMAZED by your answers, and report back here on your progress, please! I'll set a reminder to revisit this post